Pyrographical device.



PATENTED .JUNE 23, '.1908B y H. BOLTON.. PYRGGRAPHIGAL DEVICE.ARPLIGATION FILED Dnc. 2s, 1907.

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rPAT]ENT OFFICE.

HERBERT HOLTON, OF NEW YORK, N. Y.

PYROGRAPHICAL DEVICE.

Specification of Letters Patent.

Patented June 23, 1908.

Application filed December 23, 1907. serial No. 407,668.

To all whom it may concern:

Be it known that I, HERBERT HoLToN, a citizen of the United States,residing at New York city, Bronx borough, county and State of New York,have invented certain new and useful. Improvements in PyrographicalDevices,.of which the following is a clear, full, and exact description.

This invention relates to pyrographic devices, but more. particularlyvto that class which use ordinary illuminating gas for the purpose ofheating the burning point of the instrument, one ofthe objects of theinvention being to provide an instrument of this variety which can becheaply manufactured, and to gain this end I have designed my improveddevice in such a manner as to require a minimum amount of material forthe essential parts.

To render my improved device'capable of requiring but little space whenpacked, also to allow the parts thereof to be easily replaced, I preferto make the device capable of disassemblage. h e

To these and other ends which will hereinafter appear my inventioncomprises the novel features of improvement and combination andarrangement of parts which I will now proceed to describe and finallyclaim, reference being, had to the accompanying drawing, forming parthereof, wherein- Figure 1 illustrates an assembled view, in elevation,of my improved pyrographic device; Fig. 2 is an enlarged longitudinalsectional view of the stock of the burning instrument, the burning pointand tube-coupling being shown in elevation; Fig. 3 is an enlarged detailsectional view of the tube-coupling; Fig. 4 is an enlarged sectionaldetail view of the tube-coupling, showing the said coupling 'fitted witha rubber sleeve which adapts the coupling for connection with a gas-tipor the like; Fig. 5 is an enlarged face view of the device as shown inFig. 2, looking from the left; and Fig. 6 is a side elevation of myimproved burning instrument, showing one of the functions of the shield.

Like numerals ofreference indicate corresponding parts in the severalviews.

Referring to the drawing, 1 indicates the vburning instrument, while 2indicates a tube which connects the instrument with a gas supply 3. Thestock 4 of the burning instrument 1 is made preferably of wood and iscounter-bored, as at 5, to receive a body or bushing 6 of somenon-conducting material, such as asbestos. The bushing 6 retains theburning point or needle 7, which comprises a tube, perforated as at 7 a,and sealed at its outer end 18. In order to lessen the cost of theburning instrument, the burning point or needle 7 is made comparativelyshort, as shown, and a comparatively small amount of asbestos, forinstance, need be used. To convey gas to the needle 7 the counter-bore 5in the stock 4 is placed in communication with the gas tube 2 by meansof the chamber 8, said chamber 8 terminating in a tapered bore 9a, intowhich the tapered neck 1() of the coupling 1`1 is adapted to enter andremain in place by frictional contact.

The coupling 11 is provided with a tapering duct 12, into the larger endof which one end of the tube 2 will enter. The object of tapering theduct 12 is to cause the end of the tu e 2 to firmly contact the sidesofthe duct when the said tube is pressed'in, whereby a gas tightconnection is made. The coupling 11 is designed to enter, as has beenabove stated, the tapered bore 9a and also to act as a coupling for theend of the tube 2 which is to receive gas from the supply 3. When thecoupling 11 is to be used for the purpose of connection with the gassupply I'stretch a rubber sleeve 13 over the tapered neck 10 of thecoupling 11, as shown in Fig. 3, and then pass the lower end 14 of thesaid sleeve 13 over the gas-tip l5 as shown in Fig. 1.

In order to render the couplings 11 gas tight I cover the outer surfaceof the tapered neck 10 with shellac, as indicated by the heavy lines 16in Fig. 4.

To secure the burning point or needle 7 in the asbestos bushing 6, Ifirst dip the said point in shellac and pass it into the bushing 6.After having inserted the bushing into the stock 4, I seal the adjacentend of the said stock 4 with shellac or other similar seale ing element.v

By reason of the fact that the couplings 11 are alike and capable ofperforming the same function, at the point of usage and of supply, thecost of manufacture of the device is lessened to the extent of savingtools, as the said couplings are interchangeable. When the device is tobe packed the couplings can be packed up separately and independently ofthe burning tool. As the asbestos bushing 6 is com aratively short, ascompared to the length of) the stock 4, and as the burning point 7is'also comparatively short a considerable saving is effected especiallywhen the device is manufactured in large quantities.

As can be seen in Fig, 2 the chamber 8 is comparativelylarge, ascompared to the bore of the burning point 7. By making the said chamberlarger in capacity than the bore ofthe point a reservoir or storagechamber is produced Which has the effect of supplying a steady iioW ofgas to the burning point in the event of the supply being intermittent.

As shown in Figs. 3 and 4 the upper end of the duct 12 is rounded as at17 to prevent the flexible tube 2 from buckling.

In order to concentrate the heat, as much as possible, around the end 18of the needle 7, also to protect the hand from the heat, I provide aiiame shield 19 of any suitable non-conducting material, preferablyasbestos said shield being placed against the end 9 of the stock 4. Tosecure the iiame shield 19 in place, and yet adapt it for removal, Iemploy in this instance (for illustration) a looped Wire clamp 20, theloop 21 of Which is adapted to irmly grasp the needle 7. The iiameshield 19 also serves as a rest for the stock to keep the flame frominjuring any article the instrument may be laid on When not in use. Toaccomplish this result the best results from the shield I prefer to makeit of greater area than the end of the stock 4.

Having noW described my invention What I claim and desire to secure byLetters Patent is 1. A pyrographic device, comprising a stock, a burningneedle carried thereby, a flame shield carried by said needle and aclamp carried by said shield adapted to grasp said needle.

2. A pyrographic device, comprising a stock, a burning needle carriedthereby, a flame shield carried by said needle, and a clamp carried bysaid shield comprising a looped Wire, the loop of which is adapted tograsp said needle.

Signed at New York, N. Y., this 21 day of December, 1907.

HERBERT HOLTON.

Witnesses ABRAM SHLIvEK, MILDRED VIALLs.

